The ________ the correlation between X and Y, the ________ the reliability of their difference scores.
A) higher; lower
B) lower; lower
C) higher; higher
D) none of the above

Question

Quizplus · Accepted Answer

If the correlation between X and Y is high, it means that the two variables are strongly related and change together. Therefore, the difference scores between them will be less reliable because any measurement error or variability in one variable will also affect the other variable, causing more variability in the difference scores. On the other hand, if the correlation between X and Y is low, it means that the two variables are weakly related and change independently of each other. Thus, the difference scores will be more reliable because any variability in one variable will have less impact on the other variable, resulting in less variability in the difference scores.

The ________ the Correlation Between X and Y, the ________

The the Correlation Between X and Y, the